DES MOINES — It’s pretty clear things have changed in the Democratic presidential race when Hillary Clinton does a sky-is-falling routine for donors.

“There are not one, but two new public polls out this week that have us down in Iowa,” Clinton campaign manager Robby Mook wrote in an email to small contributors Thursday. “Now, you should always take public polling with a grain of salt. But if you thought this race wasn’t going to be close, well, it is. This isn’t me claiming the sky is falling — these are just the facts.”